Increase the life-cycle of threads in thread-pool...

to ScDocument lifetime if possible. This helps to avoid lots
of thread setup-cost while doing recalcs especially if there are
many formula-groups in the document and most of them are fairly
light-weight.

Change-Id: Idd57e1ebd0d4e492f99e31237d4a55ec9c95a121
Reviewed-on: https://gerrit.libreoffice.org/69473
Tested-by: Jenkins
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/include/comphelper/threadpool.hxx b/include/comphelper/threadpool.hxx
index 092078199981..1cb9441cfdd1 100644
--- a/include/comphelper/threadpool.hxx
+++ b/include/comphelper/threadpool.hxx
@@ -63,8 +63,13 @@ public:
     /// push a new task onto the work queue
     void        pushTask( std::unique_ptr<ThreadTask> pTask);
 
-    /// wait until all queued tasks associated with the tag are completed
-    void        waitUntilDone(const std::shared_ptr<ThreadTaskTag>&);
+    /** Wait until all queued tasks associated with the tag are completed
+        @param  bJoinAll - if set it joins all threads at the end if no other tasks from other tags.
+    */
+    void        waitUntilDone(const std::shared_ptr<ThreadTaskTag>&, bool bJoinAll = true);
+
+    /// join all threads if there are no tasks presently.
+    void        joinAll();
 
     /// return the number of live worker threads
     sal_Int32   getWorkerCount() const { return mnWorkers; }